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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        function Person(name,age,num,family,sex){
            this.name = "李青";
            this.age = age;
            this.num = num;
            this.family = family;
            this.sex = sex
            this.A = function(){alert(212121)}
        }
        var obj = new Person("李青",21,5,null,"man")
    </script>
</body>
</html>